KR20200145017A - Safety apparatus for cultivator - Google Patents

Abstract

The present invention relates to a safety device of a cultivator. In particular, the present invention relates to a safety device of a cultivator, wherein when cultivators such as tractor plows, reversible plows, ridge plows, plowing machines, and subsoil crushers cultivate an arable land, the shock is alleviated at the time of occurrence of an overload due to an obstacle such as a stone or rock. Thus, breakage is prevented, and work efficiency is improved. Also, production is possible through a very simple structure. To this end, the safety device of a cultivator comprises: a main frame which has a tractor connection part connected to a tractor and towed; a plurality of tilling units installed rotatably in the vertical direction on the main frame to cultivate the ground; and a plurality of cylinders installed between each of the tilling units and the main frame to elastically support the rotation of the tilling units. Each of the cylinders comprises: a body which has one side into which a rod is inserted; a pressing plate which is formed at the front end of a rod inserted into the body, and has a spatial part formed between the inner diameter and the outer diameter of the body in a state of being formed to be smaller than the inner diameter of the body; a first hydraulic hole which is formed at the body and injects or discharges hydraulic pressure; and a first hydraulic pressure supply line which is connected to the first hydraulic hole and shares hydraulic pressure with neighboring cylinders.

Description

Safety apparatus for cultivator

The present invention relates to a safety device for a cultivator, and in particular, relieves shock when an overload occurs due to obstacles such as stones or rocks when a cultivator such as a tractor plow, a lift plow, a ridge plow, a cultivator, a subsoil crusher, etc. It is related to a safety device of a tiller that can be manufactured by a very simple structure, thereby preventing damage and improving work efficiency.

In the present invention, the conventional technique and the technique of the present invention are described by way of example of a plow that is typically used among cultivators, but this is not limited to the plow.

In general, plows are used to cultivate crops by digging up the soil using livestock such as horses or machinery, etc., and turning them over to make plows.

Conventional plowing devices for tractors consist of multiple plowing devices having a plurality of plows depending on the size or horsepower of the tractor. Usually, a plowing device for a tractor is provided with a plurality of plows up to 3 to 8 plows, and each plowing part is installed in a zigzag with respect to the main frame or may be installed in a main frame with an oblique line with respect to the traction direction.

When the plowing operation is carried out during the operation of the conventional plowing apparatus for a tractor, an unexpected situation may occur in which the plow unit collides with the rock buried in the soil. Accordingly, when the plow is simply fixed to the main frame, the impact force from the rock is transmitted as it is, and the plow is damaged or deformed, thereby destroying the shape of the ridge or causing a failure of the entire device.

In order to solve this problem, Korean Patent Laid-Open No. 10-2010-0045916 filed by the present applicant proposes a plowing device for a tractor, which has a plurality of plows 20 on the main frame 10 as shown in FIG. It is installed to be rotatable in the vertical direction, and is installed so that the driving cylinders 30 elastically support the plurality of plow parts 20.

The drive cylinder 30 is a double-acting cylinder, and is connected to hydraulic lines 40 and 41 supplied from a tractor to rotate the plow part 20 in the vertical direction, and these hydraulic lines 40 and 41 are adjacent to It is shared with the drive cylinders 30, and is configured to be shared with the buffer cylinder 50 separately installed.

Therefore, when the plow part 20 is lifted upward by an obstacle or descends after avoiding the obstacle, the hydraulic pressure inside the driving cylinder 30 is greatly increased, and the increased hydraulic pressure is in the form of oil flow. By moving to the buffer cylinder 50 through 40 and 41, the resistance force of the plow part 20 is buffered.

That is, when an obstacle is encountered, an additional pressure that exceeds the basic pressure set inside the drive cylinder 30 is generated in the front part of the piston, and the pressure added to relieve this additional pressure is a hydraulic line ( By moving to the buffer cylinder 50 through 40) and being buffered, the plow part 20 can be easily rotated upward to prevent damage to the plow part 20 by an obstacle.

In addition, when the plow part 20 descends after obstacle avoidance, the additional pressure generated at the rear part of the piston moves to the buffer cylinder 50 through the hydraulic line 41 in the form of oil flow, so that the plow part 20 It is to make it easy to descend.

However, according to this conventional technology, the hydraulic pressure generated from the driving cylinder 30 is a structure that moves to the buffer cylinder 50 through the hydraulic lines 40 and 41 in the form of oil flow. Since this is a moving structure, a buffer cylinder 50 for accommodating the moving oil must be provided.

That is, a receiving means for accommodating the moving hydraulic pressure and oil must be provided. This is because the entire oil moves from the driving cylinder 30 to the receiving means, that is, the buffer cylinder 50, in a limited receiving space of the buffer cylinder 50. The degree of oil acceptance is very limited.

Therefore, when the drive cylinder 30 becomes larger, the amount of oil moved from the drive cylinder 30 increases, and the size of the buffer cylinder 50 for accommodating it should also be larger, so that the structure becomes complex. It is also a factor in increasing manufacturing cost.

In addition, if the buffer cylinder 50, which is a space for receiving the oil moving from the driving cylinder 30, cannot sufficiently accommodate, the plow part 20 cannot sufficiently rotate upwards due to the pressure resistance of the oil, and the obstacle is not avoided. Since it is not possible, there is a problem in that damage to the plow part 20 may occur.

<Prior technical literature>

1. Korean Patent Application Publication No. 10-2010-0045916

(Plowing device for tractor)

In order to solve the above problems, the present invention includes a cylinder for buffering an impact applied to a cultivation unit such as a plow, shares a hydraulic line with a neighboring cylinder, and does not move oil when an impact occurs due to an obstacle. The purpose of this is to provide a safety device for a cultivator that transmits hydraulic pressure and distributes the hydraulic pressure to neighboring cylinders to buffer it.

The safety device of the cultivation machine of the present invention for achieving the above object,

A main frame having a tractor connecting portion connected to the tractor to be towed, a plurality of cultivating units rotatably installed on the main frame to cultivate the ground, and installed between each cultivation unit and the main frame to the cultivation In the safety device of a tiller consisting of a plurality of cylinders elastically supporting negative rotation,

Each of the above cylinders

A body into which a rod is inserted into one side;

A pressing plate formed at a front end of the rod inserted into the body and formed smaller than the inner diameter of the body to form a space portion between the inner diameter and the outer diameter of the body;

A first hydraulic hole formed in the body to inflow or outflow hydraulic pressure;

And a first hydraulic pressure sharing line connected to the first hydraulic hole to share hydraulic pressure with neighboring cylinders.

According to the present invention, when the rod is compressed by an obstacle and additional pressure is generated inside the cylinder, the oil can be moved inside the cylinder, and the hydraulic pressure is shared with the neighboring cylinder through a hydraulic sharing line. Since a separate receiving means for accommodating the oil is not provided, the structure is very simple, thereby reducing the manufacturing cost.

In other words, even if a separate accommodation space for accommodating the movement of oil is not provided, when the pressure applied to the cylinder by an obstacle increases, the degree of accommodating the oil is very large, and only the pressure is moved to and dispersed in a number of adjacent cylinders. It has the effect of safely avoiding obstacles by being able to sufficiently rotate upwards.

1 is a view for explaining the safety device and operation of a tiller to which a conventional technology is applied.
Figure 2 is a view showing a tiller to which the present invention is applied.
Figure 3 is a view showing a cylinder and hydraulic sharing structure according to an embodiment of the present invention.
4 to 13 are views showing a cylinder and a hydraulic sharing structure according to various embodiments of the present invention.
14 is a view showing an exploded structure of a rotating part for preventing damage to the cylinder.
Figure 15 is a side cross-sectional view of the coupling structure of the rotating part.

The above-described objects, features, and advantages will be described later in detail with reference to the accompanying drawings, and accordingly, one of ordinary skill in the art to which the present invention pertains will be able to easily implement the technical idea of the present invention.

In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the subject matter of the present invention, a detailed description will be omitted.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

The terms used in the present invention have been selected from general terms that are currently widely used while considering functions in the present invention, but this may vary depending on the intention or precedent of a technician working in the field, the emergence of new technologies, and the like.

In addition, in certain cases, there are terms arbitrarily selected by the applicant, and in this case, the meaning of the terms will be described in detail in the description of the corresponding invention.

Therefore, the terms used in the present invention should be defined based on the meaning of the term and the overall contents of the present invention, not a simple name of the term.

When a part of the specification is said to "include" a certain component, it means that other components may be further included rather than excluding other components unless otherwise stated.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the embodiments of the present invention exemplified below may be modified in various forms, and the scope of the present invention is not limited to the embodiments described below.

The embodiments of the present invention are provided to more completely describe the present invention to those of ordinary skill in the art.

2 is a view showing a tiller to which the present invention is applied, and FIG. 3 is a view showing a cylinder and a hydraulic sharing structure according to an embodiment of the present invention.

Here, the front cultivation unit 330 and the rear cultivation unit 340 are illustrated as an example of a plow, which is a type of cultivation machine.

The main frame 300 is connected to the rear of the tractor and is towed, and a three-point tractor connection part 310 and 320 is provided in the vertical direction of the front thereof, and a plurality of tillers are spaced at the front part of the main frame 300. While having a front cultivation unit 330 fixed in the width direction of the main frame 300 is installed, a plurality of cultivators in the width direction of the frame 300 at intervals likewise in the rear part of the frame 300 A fixed rear cultivation unit 340 is installed.

These front cultivation unit 330 and rear cultivation unit 340 are installed on the frame 300 or only one cultivation unit 330 or 340 or both cultivation units 330 and 340 are front and rear of the frame 100 Each can be installed.

The cultivation parts 330 and 340 are coupled to the main frame 300 so as to be rotatable in the vertical direction, and between the main frame 300 and the frost 331 and 341 of the cultivation parts 330 and 340, the rotation of the cultivation parts 330 and 340 is elastic. A cylinder 100 for supporting is installed.

Both sides of the cylinder 100 are pin-coupled so as to be rotatable to the main frame 300 and the cultivation units 330 and 340, respectively, and the cylinder 100 is also cultivated while rotating in the vertical direction when the cultivation units 330 and 340 rotate up and down. The shock applied to the parts 330 and 340 is buffered to prevent the cultivation parts 330 and 340 from being damaged by an obstacle.

In addition, the internal hydraulic pressure of the cylinder 100 is set by the hydraulic pressure supplied from the tractor, the basic pressure value may be increased or decreased by the size of the hydraulic pressure supplied from the tractor.

The cylinder 100 is a structure that is connected to neighboring cylinders through a first hydraulic pressure sharing line 200 in order to distribute additional pressure generated by an impact applied to the plurality of cultivation units 330 and 340 to neighboring cylinders. It has, and a detailed structure thereof will be described with reference to FIG. 3.

As shown in Fig. 3, a rod 130 is inserted into the cylinder body 101 according to the first embodiment of the present invention, and a pressure plate 140 is formed at the front end of the rod 130, and at the rear end An assembly portion 120 is formed to be rotatably coupled to the main frame 300 by pins or bolts, and an assembly portion 131 is formed in the rod 130 to be rotatably coupled to the frost (331,341) Has been.

The outer diameter of the pressure plate 140 is formed smaller than the inner diameter of the cylinder body 101, and a space 150 is formed between the inner diameter of the cylinder body 101 and the outer diameter of the pressure plate 140, thereby The oil with the pressure charged in the rear part is shared with each other.

In addition, a first hydraulic hole 110 is formed on one side of the body 101, and a first hydraulic sharing line 200 is connected to the first hydraulic hole 110, so that the first hydraulic sharing line ( 200) to share hydraulic pressure with neighboring cylinders.

That is, a first hydraulic hole is formed at the same position in each of the neighboring cylinder bodies 101 so that hydraulic pressure is shared through the first hydraulic pressure sharing line 200.

These first hydraulic holes 110 may be formed in any part of the body 101.

The operation of an embodiment of the present invention having the above structure will be described.

First, when the cultivation parts 330 and 340 cultivate the ground, the cultivation parts 330 and 340 are elastically supported by the pressure of the oil filled in the cylinder body 101 to dig into the ground and cultivate it.

During cultivation, when the cultivation units 330 and 340 encounter obstacles such as stones or rocks and are lifted upward by the load, the rod 130 is compressed while being inserted into the body 101, and thereby the pressing plate 140 ) Is advanced so that the pressure in front of the pressure plate 140 increases significantly, and the pressure in the rear of the pressure plate 140 decreases relatively.

That is, an additional pressure exceeding the pressure initially set by the obstacle is formed in the front portion of the pressure plate 140, and this additional pressure is as much as the thickness, that is, the volume, of the rod 130 inserted into the body 101 by the obstacle. Will be the size corresponding to

At this time, it is necessary to relieve the additional pressure formed on the front portion of the pressure plate 140. As the pressure plate 140 advances, the oil is pressurized, and the pressurized oil is applied to the rear portion of the pressure plate 140 through the space unit 150. The flow of oil is generated by flowing into the body 101, and at the same time, the additional pressure formed inside the body 101 is transferred to the neighboring cylinder body 101 through the first hydraulic pressure sharing line 200, thereby increasing the hydraulic pressure according to the additional pressure. It will disperse the bay.

That is, in the prior art, when an additional pressure is generated by an obstacle, a receiving means for accommodating the oil moving while having the pressure is required, but in the present invention, the movement of the oil is performed by the space 150 within the body 101 The first hydraulic pressure sharing line 200 to the inside of the cylinder body 101 adjacent to only the pressure of the oil to prevent or minimize the movement of oil to the outside of the body 101 by moving to the front and rear of the pressure plate 140 through Will be delivered through.

Accordingly, even if an additional pressure occurs due to an obstacle, the flow of oil to the neighboring cylinder body 101 does not occur or is minimized, so that the overall volume of the oil is changed, that is, the internal volume of the plurality of cylinders 100 and the first hydraulic pressure sharing line There is little change in the volume of 200, so that no additional accommodation means for accommodating the flow of oil is required.

In addition, since the oil to which the additional pressure formed in front of the pressurizing plate 140 is applied through the space 150 moves to the rear of the pressurizing plate 140, the pressure is greatly relieved, the cylinder adjacent to the first hydraulic pressure sharing line 200 Since only the relatively lowered pressure rise is transmitted to the body 101, the first hydraulic sharing line 200 is prevented from being damaged by a large pressure, and it does not place a large burden on the neighboring cylinder body 101, so that cultivation work And it does not interfere with the obstacle avoidance operation.

In the end, since it is a structure that digests the movement of oil inside the cylinder body 101 and transmits only the increase in the additional pressure to the neighboring cylinder body 101, the amount of oil movement is minimized, so that there is a separate It does not require a means of accommodation, and the structure can be greatly simplified.

In addition, when the operation after the cultivation units 330 and 340 avoids the obstacle will be described, since the area of the rear surface of the pressing plate 140 is smaller than the area of the front surface of the pressing plate 140 by the thickness of the rod 130, the pressing plate 140 ), a pressure greater than that of the rear portion is applied to the front portion of the rod 130 by pushing the pressure plate 140 to the rear so that the rod 130 is elongated.

Therefore, the cultivation portions 330 and 340 are lowered by the extension of the rod 130, and the oil received in the rear portion of the pressing plate 140 by the backward movement of the pressing plate 140 is transferred to the front portion through the space unit 150. It is moved, and at the same time, the hydraulic pressure distributed to the neighboring cylinder body 101 is returned to the original cylinder body 101 to maintain the set initial pressure, thereby enabling continuous cultivation work.

4 to 13 are diagrams showing a cylinder and hydraulic sharing structure according to another embodiment of the present invention, and the structure of FIG. 4 has a structure of a general cylinder body 102, which is packed on a pressure plate 141 (not shown). Not) is mounted so that the front portion and the rear portion of the pressing plate 141 are separated from each other by the pressing plate 141, that is, they have a compartment structure.

At this time, a first hydraulic hole 110 is formed on one side of the body 102 and a second hydraulic hole is formed on the other side of the body 102 in order to share the oil having the additional pressure formed in the front of the pressing plate 141 to the rear portion of the pressing plate 141. 160 is formed, and the first hydraulic hole 110 and the second hydraulic hole 160 are connected to each other by a second hydraulic sharing line 210, thereby preventing oil from the front and rear parts of the pressure plate 141. You will share the move.

That is, one side of the second hydraulic sharing line 210 is connected to the first hydraulic hole 110, and the other side is connected to the second hydraulic hole 160 so that the movement of oil through the second hydraulic sharing line 210 is They are shared with each other.

In addition, the first hydraulic sharing line 200 is connected to the second hydraulic sharing line 210 to share hydraulic pressure with the neighboring cylinder body 102, and the operation is the same as in the embodiment of the present invention.

The first hydraulic hole 110 is located at the front portion of the pressing plate 141 when the rod 130 is compressed to the maximum, and the second hydraulic hole 160 is the second hydraulic hole 160 when the rod 130 is maximally extended. It is positioned at the rear portion of the pressure plate 141 to share the movement of oil in the front and rear portions of the pressure plate 141.

5 is a structure similar to that of FIG. 4, but the second hydraulic sharing line 210 for moving oil from the cylinder body 102 is connected to the third hydraulic hole 170 and the fourth hydraulic hole 180 separately formed. to be.

Of course, the third hydraulic hole 170 and the fourth hydraulic hole 180 are formed in any one cylinder body 102 or one or more cylinder bodies 101 to remove oil in the front and rear of the pressure plate 141. 2 It may have a structure to move through the hydraulic sharing line (210).

In addition, since the first hydraulic hole 110 shares hydraulic pressure with the neighboring cylinder body 102 through the first hydraulic sharing line 200, the flow of oil is shared through the second hydraulic sharing line 210. And, it is a structure in which hydraulic pressure is shared through the first hydraulic pressure sharing line 210.

In this case as well, the first hydraulic hole 110 and the third hydraulic hole 170 are located at the front portion of the pressure plate 141 when the rod 130 is compressed to the maximum, and the fourth hydraulic hole 180 When the silver rod 130 is maximally elongated, it is configured to be positioned at the rear portion of the pressure plate 141, respectively.

6 is a first hydraulic hole 110 formed in the front portion of the pressure plate 141 is connected to each other by a first hydraulic pressure sharing line 200 to the first hydraulic hole 110 formed in the adjacent cylinder body 102, The second hydraulic holes 160 formed in the rear portion of the pressure plate 141 are connected to each other by the second hydraulic sharing line 220 to share the flow of hydraulic pressure and oil.

For example, when the first cylinder body 102 compresses the rod 130 by the impact of an obstacle and the pressure plate 141 advances, the pressure formed in the front portion of the pressure plate 141 is the first hydraulic hole 110 and the first hydraulic hole 110. 1 Through the hydraulic sharing line 200, the flow of oil with pressure is transmitted to and received by the first hydraulic hole 110 of the adjacent cylinder body 102, and at the same time, the pressure plate ( When negative pressure is formed in the rear portion of 141), the space becomes larger.

Therefore, when the pressure plate 141 of the neighboring cylinders 102 moves to the rear in response to the amount of oil moved to the front portion of the pressure plate 141 of the neighboring cylinder body 102, the oil at the rear portion is Since it is introduced into the rear space of the pressing plate 141 advanced by the obstacle through the third hydraulic sharing line 220, the pressure of the plurality of cylinder bodies 102 does not increase, and the oil having the pressure is distributed and received to the obstacle. It can absorb the shock caused by.

In addition, the first hydraulic hole 110 is located at the front portion of the pressure plate 141 when the rod 130 is compressed to the maximum, and the second hydraulic hole 160 is the rod 130 is maximally elongated. When configured to be respectively located on the rear portion of the pressure plate 141.

7 is the same as that of FIG. 6, and the first hydraulic hole 110 and the second hydraulic hole 160 of at least one of the cylinder bodies 102 are the second hydraulic sharing line. By being connected by 210, the pressure plate 141 of the entire cylinder body 102 has a structure in which the hydraulic pressures of the front and rear sides are shared with each other.

That is, when an impact is applied to any one of the cylinder bodies 102 and the pressure increases, the neighboring through the first hydraulic sharing line 200, the second hydraulic sharing line 200, and the third hydraulic sharing line 220 It is to share the oil flow and hydraulic pressure with the cylinder body 102.

8 shows that the second hydraulic sharing line 200 is deleted from the structure of FIG. 7 and the first hydraulic sharing line 200 and the third hydraulic sharing line 220 are connected to each other through the fourth hydraulic sharing line 230. Thus, the entire cylinder body 102 has a structure in which oil flow and hydraulic pressure are shared through the fourth hydraulic pressure sharing line 230.

In the case of FIG. 9, as shown in FIG. 6, a first hydraulic hole 110 and a second hydraulic hole 160, a first hydraulic sharing line 200, and a third hydraulic sharing line 220 are provided. The 3 hydraulic hole 170 and the fourth hydraulic hole 180 are additionally formed to move and share the flow of oil inside the cylinder body 102 through the second hydraulic sharing line 210.

Of course, as shown in FIG. 10, the third hydraulic hole 170 and the fourth hydraulic hole 180 may be connected to the entire cylinder body 102 through the second hydraulic sharing line 210, but at least one or more cylinder bodies It may have a structure in which the third hydraulic hole 170 and the fourth hydraulic hole 180 are connected to 102 through the second hydraulic sharing line 210.

In this case, the oil flow and hydraulic pressure of the entire cylinder body 102 can be shared through the cylinder body 102 to which the second hydraulic sharing line 210 is connected.

At this time, the first hydraulic hole 110 and the third hydraulic hole 170 are located at the front portion of the pressing plate 141 when the rod 130 is compressed to the maximum, and the second hydraulic hole 160 and the second hydraulic hole 160 The 4 hydraulic holes 180 are configured to be respectively positioned at the rear portions of the pressing plate 141 when the rod 130 is extended to the maximum.

In the case of FIG. 11, in the structure of FIG. 6, at least one communication hole 142 is formed in the pressing plate 141, and by connecting the front part and the rear part of the pressing plate 141 of the communication hole 142 to each other, The oil flows to the front and rear of the pressure plate 141.

Of course, the communication hole 142 may be formed with all the pressing plates 141, alternatively, at least one or more pressing plates 141 may be formed, and the cylinder body adjacent through the communication hole 142 It is possible to share the oil flow and hydraulic pressure with 102.

FIG. 12 shows a plurality of cylinder bodies in the structure of FIG. 6 by forming a space 150 in which the outer diameter of the pressure plate 140 provided in at least one cylinder body 101 is smaller than the inner diameter of the body 101 It is a structure in which the oil and hydraulic pressure moved from 102 are shared and accommodated through the space unit 150.

In FIG. 12, the first hydraulic hole 110 and the second hydraulic hole 120 are shown in the cylinder body 101 having the pressure plate 141, but in some cases, the first hydraulic hole 110 or the second hydraulic hole It may have only one of the 120, and the first hydraulic sharing line 200 and the second hydraulic sharing line 220 may be connected in common.

13 is a cylinder body 102 adjacent to a cylinder body 101 having a pressure plate 140 having an outer diameter smaller than the inner diameter of the pressure plate 140 shown in FIG. 12, that is, the cylinder body 101, that is, the pressure plate 140. ) And the inner diameter of the cylinder body 102 is a structure alternately positioned between the cylinder body 102 in which no space is formed.

This structure enables rapid shock absorption by allowing the flow of hydraulic pressure and oil generated from the cylinder body 102 to be transferred and moved to the adjacent cylinder body 101 in immediate proximity.

In the embodiments of FIGS. 4 to 13 above, the first hydraulic hole 110 and the third hydraulic hole 170 are located at the front portion of the pressing plates 140 and 141 when the rod 130 is compressed to the maximum, The second hydraulic hole 160 and the fourth hydraulic hole 180 are configured to be respectively positioned on the rear portions of the pressure plates 140 and 141 when the rod 130 is extended to the maximum.

On the other hand, in each of the above embodiments, the cultivation units 330 and 340 have a structure in which the cultivation units 330 and 340 encounter an obstacle and rotate upward to avoid the obstacle, but when the cultivation units 330 and 340 avoid the obstacle while deflecting the obstacle, As it is bent to the left or right, damage is caused to the connection part between the cylinder 100 and the main frame 300, and damage to the cultivation parts 330 and 340 is also accompanied.

Accordingly, between the cylinder 100 and the main frame 300, a rotating part 400 capable of rotating in the vertical and horizontal directions is installed to prevent damage to the cylinder 100.

9 is a diagram showing the disassembled structure of the rotating part to prevent damage to the cylinder, and FIG. 10 is a side cross-sectional view of the coupling structure of the rotating part, and a pair of fixing on the part where the cultivation parts 330 and 340 are located on the main frame 300 The pieces 350 are fixed and installed at intervals from each other in the left and right directions, and the shaft support holes 351 are formed in the same positions on the upper side of the fixed pieces 350, and the cultivation parts 330 and 340 are supported on the lower side. A secondary shaft support hole 352 is formed.

The shaft support hole 351 is inserted into a vertical rotation hole 410 to enable rotation in the vertical direction. To this end, rotation shafts 411 and 412 protrude from both sides of the vertical rotation hole 410 so that the shaft hole It is inserted into the 351, and the vertical rotation opening 410 is formed with a through hole 413 penetrating from the upper side to the lower side.

At the rear end of the cylinder 100, left and right rotation openings 420 and 430 protruding rearwardly at intervals from the upper side and the lower side, respectively, are formed, respectively, and pin holes 421 and 431 are formed at the same positions.

Therefore, the left and right rotating ports 420 and 430 are inserted into the upper and lower sides of the vertical rotating port 410, and then the coupling pin 440 is inserted through the pin hole 421, the through hole 413, and the pin hole 431 By being fixed, the cylinder 100 rotates in the vertical direction by the up and down rotation ports 410, and by rotating in the left and right directions by the left and right rotation ports 420 and 430, the up and down directions applied to the cylinder 100 when avoiding obstacles and left and right It should be able to withstand directional impact and external force.

The coupling pin 440 has a long bolt shape, and may pass through the through hole 413 and the pin holes 421 and 431 and then fastened by a nut 450 from the lower side.

Although the above-described preferred embodiment according to the present invention has been described, the present invention is not limited thereto, and it is possible to implement various modifications within the scope of the claims, the detailed description of the invention, and the accompanying drawings. Belongs to the invention.

100: cylinder
101,102: cylinder body
110: first hydraulic hole
130: load
140,141: pressure plate
142: communication hole
150: space part
160: second hydraulic hole
170: 3rd hydraulic hole
180: 4th hydraulic hole
200: first hydraulic shared line
210: second hydraulic shared line
220: 3rd hydraulic sharing line
230: 4th hydraulic sharing line
300: frame
330,340: Ministry of Agriculture
400: rotating part

Claims (12)

A main frame having a tractor connecting portion connected to the tractor to be towed, a plurality of cultivating units rotatably installed on the main frame to cultivate the ground, and installed between each cultivation unit and the main frame to the cultivation In the safety device of a tiller consisting of a plurality of cylinders elastically supporting negative rotation,
Each of the above cylinders
A body into which a rod is inserted into one side;
A pressing plate formed at a front end of the rod inserted into the body and formed smaller than the inner diameter of the body to form a space portion between the inner diameter and the outer diameter of the body;
Consists of; a first hydraulic hole formed in the body to inflow or outflow hydraulic pressure,
And a first hydraulic sharing line connected to the first hydraulic hole to share hydraulic pressure with neighboring cylinders.
A main frame having a tractor connecting portion connected to the tractor to be towed, a plurality of cultivating units rotatably installed on the main frame to cultivate the ground, and installed between each cultivation unit and the main frame to the cultivation In the safety device of a tiller consisting of a plurality of cylinders elastically supporting negative rotation,
Each of the above cylinders
A body into which a rod is inserted into one side;
A pressing plate formed at the front end of the rod;
A first hydraulic hole formed on one side of the body to inflow or outflow hydraulic pressure;
Consists of; a second hydraulic hole formed on the other side of the body to inflow or outflow hydraulic pressure,
A second hydraulic pressure sharing line connecting the first hydraulic hole and the second hydraulic hole to share hydraulic pressure of the front and rear sides of the pressure plate;
And a first hydraulic sharing line connected to the second hydraulic sharing line or the cylinder body to share hydraulic pressure with an adjacent cylinder body.
A main frame having a tractor connecting portion connected to the tractor to be towed, a plurality of cultivating units rotatably installed on the main frame to cultivate the ground, and installed between each cultivation unit and the main frame to the cultivation In the safety device of a tiller consisting of a plurality of cylinders elastically supporting negative rotation,
Each of the above cylinders
A body into which a rod is inserted into one side;
A pressing plate formed at the front end of the rod;
A first hydraulic hole formed on one side of the body to inflow or outflow hydraulic pressure;
Consists of; a second hydraulic hole formed on the other side of the body to inflow or outflow hydraulic pressure,
A first hydraulic pressure sharing line connected to the first hydraulic hole to share hydraulic pressure with neighboring cylinder bodies;
A safety device for a tiller, comprising: a third hydraulic sharing line connected to the second hydraulic hole to share hydraulic pressure with neighboring cylinder bodies.
The method of claim 3, wherein the first hydraulic hole and the second hydraulic hole of at least one of the cylinder body are connected by a second hydraulic sharing line, or the first hydraulic sharing line and the third hydraulic sharing line are connected to each other. A safety device for a tiller, characterized in that.
The cultivator of claim 3, wherein a third hydraulic hole is formed on one side of at least one of the cylinder bodies, and a fourth hydraulic hole is formed on the other side, and is connected to each other by a second hydraulic sharing line. safety device.
4. The safety device of claim 3, wherein a communication hole is formed in the pressing plate of at least one cylinder body to communicate the front and rear portions of the pressing plate with each other.
A main frame having a tractor connecting portion connected to the tractor to be towed, a plurality of cultivating units rotatably installed on the main frame to cultivate the ground, and installed between each cultivation unit and the main frame to the cultivation In the safety device of a tiller consisting of a plurality of cylinders elastically supporting negative rotation,
Each of the above cylinders
A body into which a rod is inserted into one side;
A pressing plate formed at a front end of the rod inserted into the body;
A first hydraulic hole formed on one side of the body to inflow or outflow hydraulic pressure;
A second hydraulic hole formed on the other side of the body to inflow or outflow hydraulic pressure;
A first hydraulic pressure sharing line connected to the first hydraulic hole to share hydraulic pressure with neighboring cylinders;
Consists of; a third hydraulic sharing line connected to the second hydraulic hole to share hydraulic pressure with neighboring cylinders,
At least one of the cylinders, the outer diameter of the pressure plate is formed to be smaller than the inner diameter of the body, the safety device of a tiller, characterized in that the space is formed between the inner diameter and the outer diameter of the body.
The safety device according to claim 7, wherein the cylinders in which the spaces are formed are alternately positioned between cylinders that do not form the spaces.
The method according to any one of claims 2, 3, or 7, wherein the first hydraulic hole is located at the front part of the pressure plate when the rod is compressed to the maximum, and the second hydraulic hole is extended to the maximum. A safety device for a tillage machine, characterized in that it is configured to be positioned at each of the rear portions of the pressurizing plate.
The method of claim 5, wherein the first hydraulic hole and the third hydraulic hole are located at the front portion of the pressure plate when the rod is compressed to the maximum, and the second hydraulic hole and the fourth hydraulic hole are formed when the rod is maximally elongated. Safety device for a tiller, characterized in that configured to be positioned at each of the rear portions of the pressing plate.
The safety device according to any one of claims 1 to 3 or 7, wherein the cylinder is connected to the main frame by a rotating part capable of rotating vertically and horizontally.
The method of claim 11, wherein the rotating part
A fixing piece formed on the main frame;
An up-down rotation tool that is axially supported so as to be rotated in an up-down direction on the fixed piece;
A safety device for a cultivator, characterized in that consisting of; one side is axially supported so as to be rotated in the left and right directions on the up and down rotation tool, and the other side is fixed to the cylinder.

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